Jiro is a character from the story of Ichi the Killer. He is one half of a pair of twin brothers, working alongside his sibling Saburo as a corrupt private detective. The brothers are hired by the yakuza enforcer Kakihara to assist in tracking down the elusive killer, Ichi. Jiro and Saburo are depicted as being sadistic in their methods, and they participate in the brutal interrogation of characters such as a prostitute named Miyu-Miyu to extract information. Jiro meets his end when he is killed by Ichi, who snaps his neck with a powerful kick. His death is immediately sensed by his twin brother, Saburo. Prior to these events, the brothers had an older sibling named Ichiro, who had already died before the story begins. No further reliable information is available about Jiro's background, personality, motivations, role beyond these events, key relationships other than with his brothers, character development, or any notable abilities.